It's 2016 Tiagra, which is the newer style, rather than old loopy cable type. Will have a fiddle and hope everything doesn't fall apart.If it has been trapped in the mechanism and providing it is similiar to 5700 and 6700 shifters you can loosen the bolt that holds the mechanism together, it is located underneath the shifter, you have to remove the clamp that holds it to the handlebars to reach it.
It's 2016 Tiagra, which is the newer style, rather than old loopy cable type. Will have a fiddle and hope everything doesn't fall apart.